Abstract
A theory for in-plane atom-surface scattering has been developed based on classical mechanics. It features single and double binary collisions with surface atoms and describes the contributions of the different types of collisions to the angular and energy distributions of the scattered particles. The differences between a purely two-dimensional treatment and the three-dimensional treatment of the scattering problem are discussed. Since it is found that these differences can be quite large a method has been developed which makes it possible to correct a two-dimensional calculation for the contribution of three-dimensional effects without an undue increase in computer time. Parameters of the interaction potential as well as the angle of incidence are found to significantly influence this correction. The theory also accounts for the thermal motion of the surface atoms treating them as harmonic oscillators and assuming the density of phonan states D(ω) from Debye's theory.
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